In addition to the subject error, your Directory Service log contains:

Event: Error
Source: NTDS ISAM
Category: Logging/Recovery
ID: 413
User : N/A
Description : NTDS (248) Unable to create the log. The drive might be read-only, out of disk space, misconfigured, or corrupted. Error -519.

This behavior will occur if you are currently logging to %SystemRoot%\Ntds\Edbffff0.log and this log has reached its' maximum size.

NOTE: When you first implement Active Directory, the transactions are logged to %SystemRoot%\Ntds\Edb.log. When this log reaches its' maximum size limit, a new %SystemRoot%\Ntds\Edb00001.log file is created. When %SystemRoot%\Ntds\Edb00001.log reaches its' maximum size limit, a new %SystemRoot%\Ntds\Edb00002.log file is created. When %SystemRoot%\Ntds\Edbffff0.log is finally created and reaches its' maximum size, no new logs can be created.

To resolve this issue:

1. Restart your Windows 2000 Active Directory server in Directory Service Restore Mode.

2. Open a CMD.EXE window.

3. Type the following commands, pressing Enter after each line:

<b>ntdsutil
files
header
recover
header
q
Semantic database analysis
go
q</b>
4. Type CD /D %SystemRoot%\ntds and press Enter.

5. Type del /q Edb.chk and press Enter.

6. Type del /q *.log and press Enter.

7. Shutdown and restart your server.